TexPorsche

Yes, you will need to drill them out or use a dremel tool to maybe grind the heads off. I remember the one in the center. I'm not sure about the other two in front of the expansion valve...Just a suggestion, if you have a dremel tool that can reach into the cavity where the screw head is and grind it off? After that the remaining part might be able to be removed with a needle nose pliers.

Just a thought

Vandit

Looks like I'll be buying a Dremel Flex Shaft accessory.

So are these tamper-proof screws? Not just a screw whose head has corroded past usability?